Pump



y 1934- LE ROY A. PRESCOTT 1,956,876

PUMP

2 Sheets-Sheet l Filed March 17. 1931 May 1, 1934. LE ROY A. PRESCOTT PUMP 2 sheets sheet 2 Filed March 17. 1931 wpmviwa- Patented May 1, 1934 UNITED STATES PATENT OFFICE PUlVIP 4 Delaware Application March 17, 1931, Serial No. 523,289

2 Claims. (01. 221-103) My invention is particularly applicable to pumps for dispensing lubricants from a liquid container upon which the pump may be temporarily or permanently mounted. Such devices are used for dispensation of lubricant to the public and for dispensation of lubricant for the use of the owner of the pump. In the former case, purchasers of such pumps require a registering mechanism connected therewith so as to register the volume of lubricant dispensed at each dispensing operation. However, if such pumps are purchased for private use, a considerable saving is effected by omitting such registering mechanism therefrom.

Therefore, it is the ordinary practice for manufacturers of such pumps to make two different kinds, respectively with and without registering mechanism, and if a purchaser of such a pump without registering mechanism desires to have registering mechanism in connection therewith, it

is necessary to return the pump to the factory fo alteration, or exchange.

Therefore, the purpose and effect of my invention is to provide a pump structure with means for cooperation with an accessory registering mechanism which may be readily attached thereto or removed by an unskilled operator, such as the average purchaser without impairing the appearance or operation of the dispensing mechanism of 3c the pump, which latter, in either case, retains means adapted to cooperate with the registering mechanism. Therefore, a purchaser of my im proved pump who concludes to have it provided with registering mechanism may obtain the latter as an accessory which may be readily attached without returning the pump to the factory.

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified.

' of a pump structure including a convenient form of my invention and attached to a rectangular lubricant receptacle.

Fig. II is a fragmentary plan sectional view taken on the line II, II, in Fig. I but on a larger scale.

Fig. III is a fragmentary vertical sectional view taken on the line III, III, in Figs. II and IV.

Fig. IV is a fragmentary elevation of the right hand side of the structure shown in Fig. III, the

operating crank handle being omitted.

In said figures, the pump structure 1 is adapted to be temporarily or permanently mounted upon any suitable lubricant liquid container 2, to which it may be conveniently secured by screws 3 ex- In said drawings; Fig. I is a perspective view tending through the base flange 4 of said pump structure. The lubricant conduit 5, which depends from said base 4 within the container 2, carries a foot valve 6 at the bottom thereof which is a check valve adapted to open inwardly.

The pump cylinder '7 is secured between said base 4 and the cap 8 by the bolts 9 which extend through the flange on said cap 8 in screwthreaded engagement with the flange on said base plate 4. Said cylinder contains the piston 10 having the check valve 11 which also opens upwardly controlling the passage of fluid through said piston. Said piston is adapted to be reciprocated in said cylinder 7 by the rack 13 which engages the gear pinion 14. Said pinion is conveniently formed in unitary relation with the shaft 15. As shown in Fig. III; said shaft 15 is journaled at its inner end in the bearing 16 in said cap 8, and is journaled at its outer end in the bearing 18 provided with the stufiing box 19. Said shaft.15 is flattened at its outer end as shown in Fig. IV, for engagement with the crank 20 provided with the handle 21 by which it may be turned. It is to be understood that turning movement of said crank 20 clockwise lifts said piston 10 in said cylinder 7 creating a partial vacuum upon the lubricant in the container 2 and causing the lubricant to rise in said conduit 5 past the foot valve 6 until said piston reaches the upper limit of its stroke. Thereupon, reverse turning movement of .the crank 20 forces said piston downward to the lubricant) until the lubricant is raised from the container to the space above the piston 10 .and is discharged through the conduit 23 and dispensing nozzle 24 past the check valve 25'which opens outwardly. Said valve 25 closes automatically when the crank 20 is manipulated to thrust the piston 10 downwardly, and thus prevents return of the lubricant from the conduit 23 into the pum cylinder 7.

As shown in Fig. III, said shaft 15 is provided with the nut 27, whereby said crank 20 may be detachably held inrigid connection therewith; the lock washer 28, interposed between said nut and crank, serving to prevent accidental displacement of said nut. However, said nut, washer, and crank may be removed to permit cooperative conne'ction of said shaft with the auxiliary registering mechanism in the accessory casing 30 which, as shown in Fig.'II, includes the attaching flange 31 having apertures 32 to receive the screws 34 which extend in threaded engagement with sockets 35 in the pad 36 on said lubricant dispensing conduit 23, which is in integral relation with said cap 8. Such cooperative connection is effected by fitting the flattened end of said shaft 15 through the correspondingly shaped opening in the gear wheel 37 which has the hub 38 journaled in the lid 39 of said casing 30. Said lid is secured in rigid relation with said casing 30 by any convenient means, preferably the five rivets 40 indicated in Fig. IV and one of which is shown in Fig. III. Said gear 37 is in mesh with the gear 41 which is carried by the stud shaft 42 which, as shown in Fig. III, may be riveted in said casing 30. Said gear 41 is in mesh with the gear 43 on the shaft 44 of the indicating mechanism which is mounted in the casing 45. Said casing 45 is held in said casing 30, and incloses a series of disks 46 bearing numbers from zero to nine on their peripheries, a portion of which are exposed at the window 48 in said casing 45 which registers with the window 49 in said casing 30. Of course, said indicating mechanism includes one way clutch means connecting said shaft 44 with said disks 46 so that said disks are turned by said shaft during the up stroke of the rack 13 to show a corresponding increment in the number displayed through said window 48, and said disks are released so that they remain stationary during the down stroke of said rack. Such clutch means may include the balls 51 bearing on said shaft 44 in the inclined recesses 52 in the units disk 46.

Said crank 20 may be operated to charge the conduit 23, the casing of the valve 25, and the nozzle 24 with lubricant ready to be dispensed. With the piston 10 then at the lower end of its stroke in said cylinder 7, said accessory registering mechanism is then fitted in cooperative engagement with the shaft 15, as shown in Fig. III. Thereupon, rotation of said crank 20 clockwise one revolution is eifective to dispense one quart of lubricant and advance the registering mechanism one digit. Said crank is then moved counterclockwise without effect upon said registering mechanism but with the effect of shifting said piston 10 to the bottom of the cylinder 7, forcing another quart of lubricant up through said piston 10, past said check valve 11, ready to be dispensed by another clockwise movement of said crank 20 by the operator.

I do not desire to limit myself to the precise details of construction and arrangement of the pump mechanism or of the accessory registering mechanism herein set forth, as it is obvious that various changes may be made therein without departing from the essential features of my inven tion, as defined in the appended claims.

I claim:

1. The combination with a liquid dispensing pump structure, including a casing and a member mounted for continuous movement in said casing during each dispensing operation; of means on said casing for detachably holding in rigid relation therewith an accessory total registering mechanism; and means on said movable member continuously operatively engaging said registering mechanism for causing the latter to continuously register the amount of fluid dispensed by said pump structure; wherein the registering mechanism has a gear, and the movable member is a rotary shaft provided with a gear pinion engaged with a reciprocatory rack carrying a pump piston; and said shaft has a flattened portion rotatably engaging a gear in coaxial relation with said shaft; a screw thread on the end of said shaft which is flattened; a crank detachably engaging said flattened end of the shaft; and I a nut is fitted to said shaft screw thread for retaining both said crank and registering mechanism gear in cooperative relation with said shaft.

2. The combination with a liquid dispensing pump including a casing and a rotary shaft; a registering mechanism accessory to said pump, including a casing; a' registering mechanism gear with means for detachably engaging said shaft, inclosed by said registering mechanism casing; means 'for detachably engaging said registering mechanism casing with said pump casing; and means for detachably engaging said pump shaft with said registering mechanism gear; whereby said registering mechanism gear is continuously turned by said shaft during each dispensing operation, and said registering mechanism continuously indicates the precise quantity of liquid which has been dispensed.

LE ROY A. PRESCOTT. 

